Borelli, Giovanni Alfonso
,
De motionibus naturalibus a gravitate pendentibus
,
1670
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impulſiua tendendi verſus ſcopulum, è contra, quia
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videmus, quòd pila ferrea non poteſt à contactu ſoli
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ſeiungi, ac diuelli niſi æqualis facultas, & energią
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contraria adhibeatur, ſcilicet niſi apponatur pondus
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in altera extremitate libræ, quod æquale ſit grauita
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ti prædictæ pilæ ferreę, ſicuti cùm homo robuſtus co
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lumnam aliquam impellit, non poteſt ab ea ſeiungi,
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niſi adhibeatur vis motiua prorsùs æqualis ei, quam
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homo exercet; hinc de ducemus pilam vim grauitatis,
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& hominem vim muſculorum exercere. </
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Cap. 3. flui
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dum in ſuo
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toto quie
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ſcens pon
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derat.</
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<
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">Porrò effectus producti ab illa ferrea pila à paui
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mento ſubnixa plures ſunt, ac varij, conſtringuntur
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nempè pori ſubiecti corporis pilam ſuſtinentis, in
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flectitur paritèr idipſum contunditurque, & multo
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tiès diffringitur, ac diſſilit in particulas minimas,
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igitur ſi huiuſmodi effectus ipſamet aqua operaretur,
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abſque vlla hæſitatione aquam in ipſamet aqua gra
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uitare affirmaremus. </
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">Modò videmus, quòd aqua ad
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ingentem altitudinem eleuata nedùm ſolum, ac fun
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dum vaſis inflectit, ſed ipſum multoties diffringit, &
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hoc magis patet ſi fundum vaſis flexibile fuerit, ſi ve
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rò conſtringi, ac condenſari poterit, illud conſtrin
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git, atque ad minus ſpatium redigit, non ſecùs ac
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homo robuſtus comprimeret, & ſlecteret corporą
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flexibilia, ac cedentia, dum ea impelleret. </
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